Palmer, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.4 °F (low) to 64.9 °F (high). Annual precipitation averages 31.3 Inches. Palmer is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.5 °F | 38.0 °F | 0.68 in. |
| February | 21.1 °F | 42.7 °F | 0.98 in. |
| March | 30.9 °F | 54.6 °F | 1.88 in. |
| April | 40.9 °F | 64.8 °F | 2.83 in. |
| May | 52.4 °F | 74.6 °F | 4.59 in. |
| June | 62.7 °F | 84.8 °F | 4.41 in. |
| July | 67.3 °F | 89.5 °F | 4.51 in. |
| August | 65.1 °F | 87.4 °F | 3.69 in. |
| September | 55.8 °F | 80.1 °F | 3.06 in. |
| October | 43.3 °F | 67.8 °F | 2.27 in. |
| November | 30.7 °F | 53.0 °F | 1.36 in. |
| December | 21.5 °F | 41.1 °F | 1.04 in. |
| Annual | 42.4 °F | 64.9 °F | 31.3 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |